from machine import Pin, PWM
import time

servo = PWM(Pin(2), freq=50)

def set_angle(angle):
    duty = int(((angle)/180 * 2 + 0.5) / 20 * 1023)
    servo.duty(duty)

btn0 = Pin(4, Pin.IN, Pin.PULL_UP)
btn90 = Pin(5, Pin.IN, Pin.PULL_UP)
btn180 = Pin(18, Pin.IN, Pin.PULL_UP)

while True:
    if btn0.value()==0:
        set_angle(0)
        print("Servo moved to 0")
        time.sleep(0.3)

    elif btn90.value()==0:
        set_angle(90)
        print("Servo moved to 90")
        time.sleep(0.3)

    elif btn180.value()==0:
        set_angle(180)
        print("Servo moved to 180")
        time.sleep(0.3)